To keep things easy, purchase fresh shrimp already peeled and deveined. Look for firm-fleshed shrimp with a fresh saltwater scent; avoid shrimp that are soft, slimy, or smell especially fishy.
Choose large or extra-large shrimp for this recipe. The shrimp should be shelled ... For that reason, I suggest using fresh garlic cloves (avoid pre-minced garlic and garlic powder).